Stabilized hole-selective layer for high-performance inverted p-i-n perovskite solar cells

• 成果类型: Article
• 署名作者: Li, Zhen; Sun, Xianglang; Zheng, Xiaopeng; Li, Bo; Gao, Danpeng; Zhang, Shoufeng; Wu, Xin; Li, Shuai; Gong, Jianqiu; Luther, Joseph M.; Li, Zhong'an; Zhu, Zonglong
• 署名单位: City University of Hong Kong; Huazhong University of Science & Technology; United States Department of Energy (DOE); National Renewable Energy Laboratory - USA; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-8201
• DOI: 10.1126/science.ade9637
• 发表日期: 2023-10-20
• 页码: 284-289
• 关键词: self-assembled monolayers; nickel-oxide; efficient; passivation; operation; SURFACES; defects; nio

摘要

P-i-n geometry perovskite solar cells (PSCs) offer simplified fabrication, greater amenability to charge extraction layers, and low-temperature processing over n-i-p counterparts. Self-assembled monolayers (SAMs) can enhance the performance of p-i-n PSCs but ultrathin SAMs can be thermally unstable. We report a thermally robust hole-selective layer comprised of nickel oxide (NiOx) nanoparticle film with a surface-anchored (4-(3,11-dimethoxy-7H-dibenzo[c,g]carbazol-7-yl)butyl)phosphonic acid (MeO-4PADBC) SAM that can improve and stabilize the NiOx/perovskite interface. The energetic alignment and favorable contact and binding between NiOx/MeO-4PADBC and perovskite reduced the voltage deficit of PSCs with various perovskite compositions and led to strong interface toughening effects under thermal stress. The resulting 1.53-electron-volt devices achieved 25.6% certified power conversion efficiency and maintained >90% of their initial efficiency after continuously operating at 65 degrees Celsius for 1200 hours under 1-sun illumination.